Improvement in rotary engines



W. l. WEED.

Improvement in Rotary-Engines.

No. 129,635, i Patented my v16, 1872.

UNITED STATES PATENT OFFICE.

w. IEvI'Nc WEED, or BINGEAMTON, NEw YORK.

IMPROVEMENT IN ROTARY ENGINES.

Specification forming part of Letters Patent No. 129,635, dated July 16, l1872.

Specication describing certain Improve- .ments in Vibratory-Piston Steam-Engines, invented by WASHINGTON IRVING WEED, of Binghamton, in the county of Broome and State of New York.

My improvements relate to that class of steam-engines having vibratory pistons; and they consist in such an arrangement of the same that no heads or diaphragms are required in the cylinder, and an increased efciency in the action of the steam thereby secured.

Figure l is a side elevation of my invention. Fig. 2 is a section, showing pistons and valves. Fig. 3 is a sectional end view, showing pistons.

A is the cylinder, resting on bed-plate M, and provided with covers A' A, through which pass shafts C C. The vibra-tin g pistons B B are secured, severally, to the shafts C C', and rock upon them as centers. E E are valves, which, actuated by an eccentric cam or other suitable device, admit to and exhaust from the cylinder A the steam supplied by the pipe X. The arms F F are secured to the outer ends of the shafts C C', and are connected by the links G G with the cranks H H placed opposite to one another.

The cranks H H being on or near their centers, and the pistons B B close together, steam is admitted by the slide-valve E through port P between the pistons B B', separating them by its pressure, and, through the connections hereinbefore described, communicating a rotary motion to the shaft and wheel L. The steam being alternately admitted to and exhausted from between the pistons B B', a continuous rotary motion is imparted to the shaft and wheel L in either direction desired by a proper movement of the valves E E. The pistons aremade steam-tightin their mov ement by suitable packing at their edges, and the in- .ner ends of the shafts C O' are fitted one within the other to keep them in line, and prevent leakage from the steam to the exhaust side of the cylinder. The shafts C C also have stufting-boxes where they pass through the cylinder-covers Al A".

I make no claim to pistons working in cyl- ,inders without heads, for I am aware that this 

